* {
  box-sizing: border-box;
  font-family: "Source Han Sans CN", "Microsoft YaHei";
}
body, html {
  margin: 0;
  padding: 0;
}
body{
  font-size: 16px;
}

::-webkit-scrollbar{
  display: none;
}




.flex{
  display: flex;
}

.flex-aic{
  display: flex;
  align-items: center;
}
.flex-juc{
  display: flex;
  justify-content: center;
}
.flex-center{
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-jub{
  display: flex;
  justify-content: space-between;
}

.flex-spa{
  display: flex;
  justify-content: space-around;
}
